Optimize wasm bindgen asset with manganis

[ealmloff]

This PR uses the manganis bundling system to hash and optimize the assets wasm bindgen generates. It also expands cli-opt to support bundling multiple js files together which is useful for the javascript files wasm bindgen outputs.

Requests for hello world app with old version of DX:

Requests for hello world app with new version of DX:

Closes #3350
Closes #3339
Closes #3277
Closes #2124

[ealmloff]

Marking this as a draft until we find the latest version of swc settings that are compatible with a broader set of javascript like #3539

[ealmloff]

This PR also fixes a few caching issues with manganis/the CLI:

• If you interrupt the CLI while it is optimizing a large folder and then restart it. The CLI would think the optimization was finished and use the partially finished folder
• If you upgrade the CLI and run it on an old project, the assets would not be re-optimized. That means any new CLI releases that fix optimization issues would not be applied until the target directory is cleared

[ealmloff]

Caching the fullstack asset folder with a long reset is problematic for legacy assets which are placed in the folder without a hashed name. That change is pulled out of this PR in favor of a followup that somehow communicates which assets are cached and not